已知抛物线
的顶点在
轴的下方,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8da46f856f743cd48c6a1f6b056578c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2023-09-08 07:14:23
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【知识点】 y=ax²+k的图象和性质解读